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Abstract

Two-dimensional homogeneous turbulent convection is studied numerically. Though Bolgiano-Obukhov scaling is approximately valid, strong differences exist in the intermittency properties of velocity and temperature increments, where the latter are similar to those of a passive scalar. The main difference of the small-scale dynamics compared to a passive scalar arises from the Kelvin-Helmholtz instability, but this process does not affect the scaling properties. A condition for a scalar field to show the ramp-and-cliff structures of a passive scalar is discussed.

Additional information

Authors: BISKAMP D, Center for Interdisciplinary Plasma Science, Max-Planck-Institut f³r Plasmaphysik (DE);HALLATSCHEK K, Center for Interdisciplinary Plasma Science, Max-Planck-Institut f³r Plasmaphysik (DE);SCHWARZ E, Center for Interdisciplinary Plasma Science, Max-Planck-Institut f³r Plasmaphysik (DE)
Bibliographic Reference: An article published in: Physical Review E, Vol.63, 045302 (2001), pp.045302-1 to 045302-4
Record Number: 200013480 / Last updated on: 2001-06-29
Category: PUBLICATION
Original language: en
Available languages: en